Walker, Spieth lead at Pebble

Jimmy Walker and Jordan Spieth sit out in front at the AT&T Pebble Beach National Pro-Am as they finished day two in California at nine-under.

Walker completed the Spyglass Hill course - one of three in use over the first three days of this tournament - in a three-under 69 while Spieth's four-under 67 at Monterey Peninsula saw him move level at the top of the leadboard.

It might have been better for the 20-year-old but for two bogeys on his round, the latter on the par-four 18th, while Walker was enjoying a drama-free afternoon up the coast.

It did appear that Hunter Mahan would provide a late twist to a wet and windy afternoon - fortunately free of the delays which brought about an early end to play on Thursday.

Starting on the back nine at Spyglass Hill, he made the turn at two under par and then made three birdies on the next four holes, but a bogey on the sixth cost him momentum and he finished with a four-under 68, leaving him in third just one stroke adrift.

Andrew Loupe, who dominated at Monterey Peninsula on Thursday with a 63 to take the overnight lead, could not get to grips with the Pebble Beach links as he carded a one-over 73, with three bogeys, to slip two shots off the pace.

Difficult conditions

Richard Lee also struggled with the conditions at Pebble Beach, and his round of 72 - following an opening 65 at Monterey Peninsula - dropped him to fifth place.

One of the more remarkable rounds of the day was put together by last week's winner in Phoenix Kevin Stadler, who had been joint 15th overnight after a 67 at Monterey Peninsula.

He seemed to have the hang of the Pebble Beach links has he recovered from an opening bogey to birdie five of the next six holes and shoot to the top of the leaderboard.

But it proved a temporary stay as the wheels came off on the eighth hole.

A double-bogey there cost Stadler whatever rhythm he had found and he followed it up with bogeys on the ninth and 10th.

By the time he had dropped shots on each of the final three holes, he had a 73 and had slipped down into a share of 29th on the leaderboard.

It seemed Pebble Beach was getting the worst of the conditions, and Phil Mickelson was another to struggle, making a double bogey on the second and dropping shots on three other holes in a 73 that left him in a tie for 17th.